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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Cartesia
S
Fireflies
A
Claude Code
S
Ollama
S
TaglineUltra-low-latency voice. Built for realtime agents.Sales-focused meeting AI with CRM integration.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Run LLMs locally. One-line install, GUI optional.
CategoryVoiceMeetingsCodingDev Platform
PricingFree tier + usage-based APIFree + $10-$19/user/moPart of Claude Pro/Max/Team plansFree + open source
Best forDevelopers building voice agents, phone bots, interactive apps.Sales teams, customer success, anyone running many discovery calls.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Devs wanting offline/local LLMs for privacy or experimentation.
Strengths
  • < 90ms latency — the fastest in the market
  • Sonic model sounds natural
  • Developer-friendly API
  • Good CRM integrations (Salesforce, HubSpot)
  • Talk-time + sentiment analytics
  • Call scoring
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Run Llama, Mistral, Qwen, etc. on your laptop
  • Simple CLI + API
  • Hardware-aware (picks the right quant)
Weaknesses
  • Fewer voices than ElevenLabs
  • Less consumer-facing brand
  • Bot-joins (intrusive)
  • Gets expensive at team scale
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Needs beefy laptop for larger models
  • Speed way behind cloud APIs
Kai's verdictS-tier for realtime. If latency matters more than voice catalog, start here.A-tier for sales teams. B-tier for solo users.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for local inference. If you care about privacy or want to tinker, install this today.
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